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  1. awk 'NR>1{a[$1]=a[$1]", "$2;c[$1]++}END{for (k in a) print c[k] a[k]}' << EOF
  2. COL1, COL2  
  3. 5, 25  
  4. 5, 67  
  5. 5, 89  
  6. 3, 55  
  7. 3, 8  
  8. 3, 109  
  9. 3, 12  
  10. 3, 45  
  11. 3, 663  
  12. 80, 34  
  13. 80, 5  
  14. EOF
Success #stdin #stdout 0.02s 5264KB
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Standard input is empty
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6, 55, 8, 109, 12, 45, 663
3, 25, 67, 89
2, 34, 5
https://ideone.com/VTq0BI
language:
Bash (bash 5.0.3)
created:
11 years ago
visibility:
public

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